نتایج جستجو برای: ژن rbcl
تعداد نتایج: 17028 فیلتر نتایج به سال:
در این مطالعه وضعیت تاکسونومیک جنس Dictyota درسواحل جنوبی ایران مورد بررسی قرار گرفت. طبقهبندی این جنس در سطح گونه بهدلیل تنوع بالای مورفولوژیک در پاسخ به شرایط محیطی و همچنین همپوشانی ویژگیهای تشخیصی پیچیده و دشوار است. برای روشن شدن، اطلاعات مورفولوژیک را با دادههای توالیهای ژنهای سیتوپلاسمی rbcL و psbA تلفیق کردیم. در این مطالعه گونه Dictyota acutiloba به عنوان یک رکورد جدید از منطقه ش...
Heterocysts of free-living cyanobacteria lack ribulose-1,5-bisphosphate carboxylase activity. Nevertheless, using in situ hybridizations, we demonstrate that transcripts for the rbcL and rbcS genes are present in both heterocysts and vegetative cells of Anabaena spp. in association with, or isolated from, the Azolla-Anabaena symbiosis. In contrast, rbcLS transcripts were detected only in vegeta...
Euglena longa, a close relative of the photosynthetic model alga Euglena gracilis, possesses an enigmatic non-photosynthetic plastid. Its genome has retained a gene for the large subunit of the enzyme RuBisCO (rbcL). Here we provide new data illuminating the putative role of RuBisCO in E. longa. We demonstrated that the E. longa RBCL protein sequence is extremely divergent compared to its homol...
BACKGROUND DNA barcoding is a technique used to identify species based on species-specific differences in short regions of their DNA. It is widely used in species discrimination of medicinal plants and traditional medicines. MATERIALS AND METHODS In the present study, four potential DNA barcodes, namely rbcL, matK, trnH-psbA and ITS (nuclear ribosomal internal transcribed spacer) were adopted...
Scutellaria baicalensis GEORGI (Lamiaceae) is the botanical origin of the well-known traditional Chinese medicine "Huang Qin" (Radix Scutellariae). Due to overexploitation that had induced a decline in natural sources, the dried roots of its congeners, S. amoena, S. rehderiana, and S. viscidula, have been used to adulterate it in recent years. This practice may cause a series of inconsistent th...
Hopea chinensis (synonym: H. hongayensis) (Dipterocarpaceae) is a threatened species found so far in only two locations: Quang Ninh (Vietnam) and Guangxi (China). The species shares many morphological characteristics with H. mollissima and the two species are often confused. To overcome this problem of identification and to investigate the genetic relationships of Hopea species with other Dipte...
Two sets of genes for the large and small subunits of ribulose 1,5-bisphosphate carboxylase/oxygenase (RuBisCO) were detected in the photosynthetic purple sulfur bacterium Chromatium vinosum by hybridization analysis with RuBisCO gene probes, cloned by using the lambda Fix vector, and designated rbcL-rbcS and rbcA-rbcB. rbcL and rbcA encode the large subunits, and rbcS and rbcB encode the small...
We used ndhF sequence variation to reconstruct relationships across 282 taxa representing 78 monocot families and all 12 orders. The resulting tree is highly resolved and places commelinids sister to Asparagales, with both sister to Liliales–Pandanales in the strict consensus; Pandanales are sister to Dioscoreales in the bootstrap majority-rule tree, just above Petrosaviales. Acorales are siste...
Due to limited morphological differentiation, diatoms can be very difficult to identify and cryptic speciation is widespread. There is a need for a narrower species concept if contentious issues such as diatom biodiversities and biogeographies are to be resolved. We assessed the effectiveness of several genes (cox1, rbcL, 18S and ITS rDNA) to distinguish cryptic species within the model 'morpho...
BACKGROUND A useful DNA barcode requires sufficient sequence variation to distinguish between species and ease of application across a broad range of taxa. Discovery of a DNA barcode for land plants has been limited by intrinsically lower rates of sequence evolution in plant genomes than that observed in animals. This low rate has complicated the trade-off in finding a locus that is universal a...
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